Since the triangles make up a spinner, the triangles are isosceles. The base is 2 cm and the perimeter is 10 cm. The measure of the two legs can be determined from 2 + 2x = 10 Where is the length of the leg Solving for x x = 4 The area an isosceles is calculated using where b is the length of the base Substitute the values and multiply with the number of triangles in the spinner